Burglar and fire alarm.



J. HARTLEY. BURGLAR AND FIRE ALARM.

APPLIOATION FILED 11133.20, 1911.

'Patenfned May 14, 1912.

INVENTOR WITNESSES ATTORNEY COLUMBIA PLANOGRAPH (30.. WASHINGTUN, n. L;

UNITED STATES PATENT OFFICE.

JAMES HARTLEY, OF PHILADELPHIA, PENNSYLVANIA.

BURGLAR AND FIRE ALARM.

To all whom it may concern:

Be it known that I, JAMES HARTLEY, a citizen of the United States, residing at Philadelphia, in the county of Philadelphia and State of Pennsylvania, have invented a certain new and useful Improvement in Burglar and Fire Alarms, of which the following is a specification.

My invention relates to a new and useful improvement in burglar and fire alarms, and especially that class of alarms in which an electric signal is used for notifying the parties within the building or an agency outside of the building when the house is being entered, or when the same is on fire.

Another object of the invention is to construct an alarm which may be set while the person is in the building or when passing out through the door.

WVith these ends in view, this invention consists in the details of construction and combination of elements hereinafter set forth and then specifically designated by the claims.

In order that those skilled in the art to which this invention appertains may understand how to make and use the same, I will describe its construction in detail, referring by letter to the accompanying drawing forming a part of this specification, in which Figure 1 is a front elevation of my improved alarm, the cover being removed, and portions thereof being broken away to more clearly show the construction. Fig. 2, a plan view of the lever arm. Fig. 3, an enlarged perspective view of the clip having a disk soldered thereto, and Fig. 4:, a front elevation of a door and jamb showing my device applied thereto, showing both the depending clip and spring member in operative position, it being understood that these two are not used at the same time.

In carrying out my invention as here embodied, A represents a metallic casing, having the lugs B provided with screw receiving openings C, whereby the casing may be attached to the door jamb above the door, as plainly shown in Fig. 4. In this casing is mounted the plunger rod D, so as to slide therein, both ends extending through the walls of the casing, the upper end being screwed on as at E, to prevent the plunger becoming dislodged.

. F is the retaining lever, having a threaded Specification of Letters Patent.

Application .filed April 20, 1911.

Patented May 14, 1912.

Serial No. 622,280.

opening G, whereby said lever may be threaded upon the screw H, mounted in one of the walls of the casing. By threading the retaining lever upon the screw II the same is tightened each time the alarm is set, and when operated will back off of the screw to facilitate its movements. This lever is provided with an aperture I, beneath which rests the plate J, soldered to the clip K over the aperture L formed in said clip. A portion of said clip is bentback upon itself, as at M forming a chamber N adapted to register with one edge of the retaining lever F.

O is a disk secured upon the plunger rod D, and between this disk and the top of the casing is coiled a spring P, adapted to force the plunger downward when the latter is released, and this disk is of sufiicient diameter to overlap the disk Q mounted upon the rod It, the latter being immovably secured to the casing andinsulated therefrom by the insulating material S. This rod R acts as one of the terminals, and to it is secured the wire T, the other terminal being the screw H and having fastened thereto the wire U, it being understood that the screw H is not insulated from the casing, so that said casing is usedas a part of the circuit.

To the free end of the retaining lever F is hinged the hasp V having a slot IV with which may register the staple X mounted upon the door, and to which can be fastened a padlock Y so that if the door-is open the space between the door and jamb will be comparatively small. In proximity to the outer end of said retaining lever is pivoted the spring Z, on the outer end of which is mounted the depending lug A, having a straight edge B for engagement with the door, and a beveled edge C adapted to ride over the top of the door when the same is being closed.

From the foregoing description it will be seen that when the hasp V is down or in the path of the door, either fastened thereto or not, that when the door is opened it will force the retaining lever F in the arc of a circle, the center of which is at the screw H. This will cause the plate J to be drawn from beneath the plunger D, releasing the same and permitting the spring P to force said plunger downward until the disk O comes in contact with the disk Q, closing the circuit and causing the alarm to ring.

The foregoing description illustrates the manner in which the alarm is operated, having been set by a person Within the building. To set the same when passing outside of the building the spring Z is placed at right angles to the retaining lever, as plainly shown in Fig. 2, the hasp V bein swung upon top of said lever, then as the door is closed the top edge of said door coming in contact with the lug A will cause the same to ride over the door because of the beveled edge C and when the door is closed the spring Z will cause the lug to drop down behind said door, so that when the door is opened the operation hereinbefore described will take place. Should the building take fire while the alarm is set, the solder about the plate J will melt, allowing the same to drop from the clip, which will release the plunger D, allowing the spring to force the same downward through the aperture I, causing an alarm, to be actuated the same as described above.

Of course I do not wish to be limited to the exact details of construction here shown as these may be varied within the limits of the appended claims without departing from the spirit of my invention.

Having thus fully described my invention, what I claim as new and useful, is

1. The herein described combination of a casing, a plunger fitted to slide therein, a spring adapted to force said plunger downward, and means for holding the plunger against the action of the spring, consisting of a pivoted retaining lever, and a clip carrying a plate mounted on the under=side of said lever said plate underlying the plunger.

2. In combination, a casing, a plunger fitted to slide therein, a spring adapted to force said plunger downward, a retaining lever provided with an aperture through which the plunger may pass pivoted to the casing, and a clip having a plate soldered to the under-side thereof, said clip adapted to engage the lever, whereby the plate may rest beneath the aperture to underlie the plunger.

3. In combination, a casing provided with a spring actuated plunger, a retaining lever pivoted to said casing and provided with an aperture through which the plunger may pass, a clip adapted to engage said lever in proximity to the aperture, and a plate sol dered to the clip on the outside thereof adapted to rest beneath the aperture and underlying the plunger.

4. In combination, a casing provided with a spring actuated plunger, a retaining lever pivoted to said casing and provided with an aperture, a clip provided with an aperture and having a portion thereof bent upon itself to form a chamber for engagement with the retaining lever, and a plate soldered to said clip on the outside thereof across the aperture thereof.

5. The herein described combination of a casing, a plunger fitted to slide therein, a spring adapted to force said plunger in one direction, a contact device carried by said plunger, a second contact device supported by the casing, a retaining lever having an aperture therein through which the plunger may pass and carrying means for engagement with the door, and a clip'carrying a plate held in place on the outside of said clip by soft solder and adapted to support the plunger against the action of the spring.

6. In combination, a casing, a plunger fitted to slide therein and projecting beyond opposite sides thereof, a spring adapted to force said plunger in one direction, a contact device carried by said plunger, a rod sup ported by the casing and insulated therefrom, a contact device carried thereby, a retaining lever having an aperture therein through which the plunger may pass, a screw secured to the casing and threaded into the retaining lever, a clip provided with an aperture and having a portion thereof bent upon itself to produce a chamber which registers with the retaining lever in proximity to the aperture in said lever, a plate disposed across the aperture in the clip on the outside thereof and held against displacement by soft solder, said plate adapted to support the plunger against the action of the spring, a hasp hinged to the outer end of the retaining lever, a flat spring pivoted to said retaining lever in proximity to its outer end, and a depending lug having a straight edge and a beveled edge carried by the free end of said spring.

In testimony whereof, I have hereunto affixed my signature in the presence of two subscribing witnesses.

' J AMES HARTLEY. Witnesses:

H. S. COHEN, RICHARD SMITH.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. G. 

